HLG (Hybrid Log-Gamma)

E1046975

HDR transfer function electro‑optical transfer function video standard

HLG (Hybrid Log-Gamma) is an HDR video standard developed for broadcast and live TV that is compatible with standard dynamic range displays while still delivering high dynamic range on supported devices.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (3)

Label	Occurrences
Hybrid Log-Gamma	4
HLG (Hybrid Log-Gamma) canonical	3
Hybrid Log‑Gamma	1

How this entity was disambiguated

This entity first appeared as the object of triple T13556905 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: HLG (Hybrid Log-Gamma)
Context triple: [HDR10, competesWith, HLG (Hybrid Log-Gamma)]

A. SMPTE ST 2084
SMPTE ST 2084 is a high-dynamic-range (HDR) electro‑optical transfer function standard, also known as Perceptual Quantizer (PQ), widely used in modern HDR video systems such as HDR10 and Dolby Vision.
B. Dolby Vision
Dolby Vision is a high-dynamic-range (HDR) imaging technology that enhances video with greater brightness, contrast, and color accuracy for a more lifelike viewing experience.
C. HDR10
HDR10 is an open high-dynamic-range video standard that uses static metadata to deliver enhanced brightness, contrast, and color compared to standard dynamic range content.
D. sRGB
sRGB is a standard RGB color space widely used for digital images, displays, and the web to ensure consistent color reproduction across devices.
E. SMPTE ST 2086 mastering display metadata standard
SMPTE ST 2086 is a standard that defines static mastering display color volume metadata for HDR content, specifying the color primaries, white point, and luminance characteristics of the reference display used during mastering.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: HLG (Hybrid Log-Gamma)
Target entity description: HLG (Hybrid Log-Gamma) is an HDR video standard developed for broadcast and live TV that is compatible with standard dynamic range displays while still delivering high dynamic range on supported devices.

A. SMPTE ST 2084
SMPTE ST 2084 is a high-dynamic-range (HDR) electro‑optical transfer function standard, also known as Perceptual Quantizer (PQ), widely used in modern HDR video systems such as HDR10 and Dolby Vision.
B. Dolby Vision
Dolby Vision is a high-dynamic-range (HDR) imaging technology that enhances video with greater brightness, contrast, and color accuracy for a more lifelike viewing experience.
C. HDR10
HDR10 is an open high-dynamic-range video standard that uses static metadata to deliver enhanced brightness, contrast, and color compared to standard dynamic range content.
D. sRGB
sRGB is a standard RGB color space widely used for digital images, displays, and the web to ensure consistent color reproduction across devices.
E. SMPTE ST 2086 mastering display metadata standard
SMPTE ST 2086 is a standard that defines static mastering display color volume metadata for HDR content, specifying the color primaries, white point, and luminance characteristics of the reference display used during mastering.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	HDR transfer function ⓘ electro‑optical transfer function ⓘ video standard ⓘ
abbreviation	HLG ⓘ
advantage	single signal for HDR and SDR displays ⓘ
backwardsCompatibleWith	SDR workflows ⓘ
belongsToStandardFamily	HDR-TV standards ⓘ
category	perceptual transfer function ⓘ
comparedWith	PQ (Perceptual Quantizer) ⓘ linked to: Perceptual Quantizer
compatibleWith	10‑bit video ⓘ 12‑bit video ⓘ BT.2020 color gamut ⓘ linked to: Recommendation ITU-R BT.2020 standard dynamic range displays ⓘ
decodingType	electrical‑to‑optical transfer function for displays ⓘ
designedFor	broadcast television ⓘ high dynamic range video ⓘ live TV production ⓘ
developedBy	BBC ⓘ NHK ⓘ
doesNotRequire	dynamic metadata ⓘ static metadata ⓘ
encodingType	optical‑to‑electrical transfer function for cameras ⓘ
fullName	Hybrid Log‑Gamma ⓘ linked to: HLG (Hybrid Log-Gamma)
goal	simplify HDR adoption in broadcast ⓘ
introducedBy	BBC R&D ⓘ NHK Science & Technology Research Laboratories ⓘ
introducedFor	next‑generation TV services ⓘ
provides	high dynamic range on supported devices ⓘ
regionOfEarlyAdoption	Japan ⓘ United Kingdom ⓘ
relatedStandard	Advanced HDR by Technicolor ⓘ linked to: Dolby Vision Dolby Vision ⓘ HDR10 ⓘ
standardizedBy	ITU-R ⓘ linked to: ITU Radiocommunication Sector
standardizedIn	ITU-R BT.2100 ⓘ
supportedBy	major streaming platforms ⓘ many HDR‑capable TVs ⓘ some set‑top boxes ⓘ
supports	scene‑referred HDR ⓘ wide dynamic range ⓘ
targetedFor	broadcast distribution chains ⓘ
usedFor	live events broadcasting ⓘ live sports broadcasting ⓘ
usedIn	4K HDR TV services ⓘ UHDTV broadcasting ⓘ streaming video services ⓘ
uses	gamma curve for mid‑tones and shadows ⓘ logarithmic curve for highlights ⓘ

How these facts were elicited